C#图表库ZedGraph：灵活易用的.NET图形绘制解决方案

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ZedGraph是一个强大的.NET类库，专注于2D图形绘制，特别适合于C#编程者创建自定义线图、柱状图和饼图。它提供了极高的灵活性，用户可以轻松调整几乎每个图表元素，包括线条样式、颜色、标签、网格线等，使其能够适应各种数据集的需求。设计者在保持易用性的同时，考虑到了自动化处理，如根据数据范围自动选择合适的刻度和步长，简化了用户的设置过程。 ZedGraph库包含Windows Forms用户控件和ASP.NET兼容版本，使得它不仅可以在桌面应用程序中使用，也能方便地集成到Web项目中。其开源特性使得它受到广大开发者的欢迎，并且拥有活跃的社区支持，如论坛和Q&A部分，开发者可以在其中找到解决问题的答案和分享经验。截至2007年6月7日的评价显示，ZedGraph获得了4.70/5的高分，共有超过14,803,585名成员参与，这表明它在业界具有良好的口碑和广泛的应用基础。为了方便用户，除了源代码下载（支持.NET 1.1和.NET 2.0），ZedGraph还提供了DLL文件单独下载选项，以及C#和VB.NET的示例项目，供开发者快速上手和深入学习。如果你正在寻找一个功能强大、易于定制的图表绘制解决方案，ZedGraph无疑是一个值得考虑的选择。通过其丰富的功能和社区支持，无论你是初学者还是经验丰富的开发人员，都能在这里找到满足需求的工具和资源。持续关注ZedGraph的最新版本更新，确保你始终能掌握最新的技术发展和优化。

Note that the AxisChange() method call must be made any time you add or change the data. This tells ZedGraph to go

ahead and recalculate all the axis ranges. (Note: This is all AxisChange() does - you can call it anytime you like, and it

will update the axis ranges based on the current set of data points. You can also avoid calling AxisChange() if you do not

want the axes rescaled.)

The above code will generate the following output:

Enhancing the graph

ZedGraph allows you to modify the graph attributes in a wide variety of ways. Each of the parts of the graph is encapsulated in a

class structure, which has modifiable properties to control the output. The following are some of the classes provided in ZedGraph

(Note that these classes are XML documented. See the ZedGraph documentation for details about each class.):

Class Description

MasterP

ane

A class to manage multiple GraphPane objects, derived from PaneBase. Use of the MasterPane class is optional,

as the GraphPane class can be used directly for a single pane. Also provides methods for layout, arrangement, and

management of the individual GraphPane objects.

GraphPa

The primary class for the graph, derived from PaneBase. Includes all other classes as properties. Also controls the pane

title, the pane frame and axis frame, backgrounds, etc.

XAxis,

YAxis,

Y2Axis

Children of the Axis class. These classes include many aspects of the axis display, including tics, grids, colors, pens,

fonts, labels, and styles.

Scale

A class instance maintained by the Axis class. Contains the scale range, step sizes, formats, and display options for the

scale. Comes in variants for Linear, Log, Text, Date, Ordinal, Exponent, LinearAsOrdinal, and

DateAsOrdinal scales.

Legend The class that describes the location, font, colors, etc., used to draw the legend.

CurveIt

An abstract base class that contains data for a single curve. LineItem, BarItem, HiLowBarItem,

ErrorBarItem, PieItem, StickItem, OHLCBarItem, and JapaneseCandleStickItem are all derived

from this class.

CurveLi

A collection class to maintain a list of CurveItem objects. The order of the curves in the list controls the Z-Order for

drawing. The last curve in the list will appear behind all other curves.

GraphObAn abstract base class that includes position information for a variety of supplemental graphic objects on a plot.

list2, Color.Blue, SymbolType.Circle );

// Tell ZedGraph to refigure the

// axes since the data have changed

zgc.AxisChange();

}

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